Flask



FIG. 1 is a front, left perspective view of the flask showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image thereof;

FIG. 3 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dash-dash-dash-dash type broken lines shown on the pour spout in the FIG. 1-4 drawing views are included for the purpose of illustrating environmental structure and form no part of the claimed design.

The dot-dash-dot-dash type broken line shown on the FIG. 5 bottom plan drawing view defines the bottom boundary of the claimed design and forms no part thereof. 

CLAIM The ornamental design for a flask, as shown and described. 